Boxelder bugs can be controlled on the trees in mid-summer with yard and garden insecticides such as diazinon, Orthene and Sevin. … A soapy water spray made with 5 tablespoons of liquid detergent per gallon of water works effectively on boxelder bugs sprayed directly, but it has no residual activity.

What pesticide kills boxelder bugs?

Swarms found on trees and houses can be sprayed with insecticidal soap. Repeated spraying may be necessary. Pyrethrin sprays will kill boxelders at all levels of their lifecycle.

Will bifenthrin kill boxelder bugs?

Answer: Bifen IT will help control boxelder bugs. You want to mix at 1oz Bifen IT per gallon water. Bifen IT will kill the Boxelder bugs after they come in contact with the treated area.